100% agree.
My parents (1980s) didn’t get involved at all. I got on with it myself, while working at weekends, playing sport and socialising. Likewise, I was pretty hands off when my DC were doing all their exams, including GSCEs. I only knew what exams they had because I asked/they told me. I wasn’t across the timetable.
I was v supportive in other ways: bringing drinks and snacks while they were revising, breakfast in bed on exam days, checking they went to sleep at a decent time, making sure their clothes were ready, ironed etc.
And of course showed an interest: asking how the revision was going, offering to test them on stuff, talking through the odd thing they might be struggling with, asking what their plans were for weekends and if they were out a lot, asking when they were planning to fit their revision in.
But IMHO, it’s not a good idea to interfere in their revision, tell them what to do when, get yourself in a tizzy, have battles. It creates more stress. IMHO, from 14, kids should be encouraged to become young adults, rather than treated like children. They have to start to be responsible for themselves, which most want to do. Otherwise, they leave school unable to organise themselves.